Memory of the day: Egypt's Helwan becomes a Governorate in 2008

CAIRO – 17 April 2022: In the following lines, ET sheds light on the most important world events that took place on April 17.

69 - Vitellius becomes emperor of the Roman Empire after the First Battle of Pedricum.

1509 - Pope Julius II lays the foundation stone for the construction of St. Peter's Basilica in the Vatican.

2008 - Presidential decree establishing Helwan Governorate in Egypt. The decree was later annulled after the 2011 revolution, and Helwan became part of Cairo Governorate again.

2014 - NASA announces the discovery of the planet Kepler 186 F, which belongs to the constellation Cygnus and is located outside the solar system in the habitable zone.

2019 - Scientists announce the discovery of natural helium hydride ions in the planetary nebula NGC 7027.